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/* *******************************************************************
* Copyright (c) 2004 IBM Corporation
*
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v1.0
* which accompanies this distribution and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Andy Clement initial implementation
* ******************************************************************/
package org.aspectj.apache.bcel.classfile;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import org.aspectj.apache.bcel.Constants;
/**
* This attribute exists for local or
* anonymous classes and ... there can be only one.
*/
public class EnclosingMethod extends Attribute {
// Pointer to the CONSTANT_Class_info structure representing the
// innermost class that encloses the declaration of the current class.
private int classIndex;
// If the current class is not immediately enclosed by a method or
// constructor, then the value of the method_index item must be zero.
// Otherwise, the value of the method_index item must point to a
// CONSTANT_NameAndType_info structure representing the name and the
// type of a method in the class referenced by the class we point
// to in the class_index. *It is the compiler responsibility* to
// ensure that the method identified by this index is the closest
// lexically enclosing method that includes the local/anonymous class.
private int methodIndex;
// Ctors - and code to read an attribute in.
public EnclosingMethod(int nameIndex, int len, DataInputStream dis, ConstantPool cpool) throws IOException {
this(nameIndex, len, dis.readUnsignedShort(), dis.readUnsignedShort(), cpool);
}
private EnclosingMethod(int nameIndex, int len, int classIdx,int methodIdx, ConstantPool cpool) {
super(Constants.ATTR_ENCLOSING_METHOD, nameIndex, len, cpool);
classIndex = classIdx;
methodIndex = methodIdx;
}
public void accept(ClassVisitor v) {
v.visitEnclosingMethod(this);
}
public Attribute copy(ConstantPool constant_pool) {
throw new RuntimeException("Not implemented yet!");
// is this next line sufficient?
// return (EnclosingMethod)clone();
}
// Accessors
public final int getEnclosingClassIndex() { return classIndex; }
public final int getEnclosingMethodIndex(){ return methodIndex;}
public final void setEnclosingClassIndex(int idx) {classIndex = idx;}
public final void setEnclosingMethodIndex(int idx){methodIndex= idx;}
public final ConstantClass getEnclosingClass() {
ConstantClass c =
(ConstantClass)cpool.getConstant(classIndex,Constants.CONSTANT_Class);
return c;
}
public final ConstantNameAndType getEnclosingMethod() {
if (methodIndex == 0) return null;
ConstantNameAndType nat =
(ConstantNameAndType)cpool.getConstant(methodIndex,Constants.CONSTANT_NameAndType);
return nat;
}
public final void dump(DataOutputStream file) throws IOException {
super.dump(file);
file.writeShort(classIndex);
file.writeShort(methodIndex);
}
}
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